PCP

Click to View Early Corner Permutation Recognition Document

Pattern Corner Permutation (PCP) is a new way of recognizing corner permutation during inspection or early in a solve. This is useful for methods such as CEOR, the early CP version of Nautilus, or 2x2. This recognition system was developed based on Straughan corner recognition. While all other early corner permutation recognition systems so far have been based on tracing through each corner to determine swaps, PCP is pattern based.

The locations of specific stickers are checked to determine the two corners that need to be swapped. In its current form, pseudo techniques are used depending on the corner currently at DBR. A mental swap is also used when the DFL corner isn't solved. In a future version of PCP, it is planned to incorporate those two corners into the pattern recognition. This means that all of the possible locations of the DFL corner and the corner at DBR will form several new pattern sets.

The original idea behind PCP around 2021 or 2022 was to check corner orientations. For example, the orientation of the LR stickers and the UD stickers together forms a unique corner case. This is like the original NMCLL recognition from 2004. Applying this recognition system to the U and R corners, or all eight corners, will show whether there is a swap and the location of the swap. If applied to all eight corners, the best swap or the starting cube orientation where no swap is necessary can be found. Really the current PCP method should be part of the Straughan recognition concept and this alternate idea should be called PCP.